Mr Blair and wife Cherie attended the ceremony in London, as did Alastair Campbell, Mr Blair's former spin doctor, playing the bagpipes in a kilt in Clan Campbell tartan.

Other guests included Steve Hilton, the current Prime Minister's former director of strategy, and his wife Rachel Whetsone, who is an executive with Google.

Mick Hucknall, former lead singer of Simply Red, Lily Cole, the model and actress, and former Labour minister Lord Adonis also attended.

The wedding at Wesley's Church, City of London, was the third for the internet entrepreneur, 46, from Alabama and the first for the bride, 40, now a director of Freud Communications.

The couple, who have one child, met at the World Economic Forum at Davos, where Mr Wales reportedly asked an aide to track down Miss Garvey, but not to get her details from Wikipedia, in case they were wrong.